Do you need to join to do that? I might consider it....IF Daniel Craig, Andy Murray, Tommy Haas, and David Cameron have Twitter's.
Oh come on, surely you knew Andy has a Twitter account? The front page of MurraysWorld has a section on the right dedicated to his Tweets, we have a thread on it stickied in Andy Talk and the media have used his account on ocassion as well
David Cameron, Daniel Craig and Tommy Haas do not have Twitter accounts.